What is a major cause of collisions with trains?*1 pointA. Trains traveling too slowly.B. Drivers misjudge the speed/distance of the train.C. Trains turning in front of oncoming traffic.D. Trains not yielding the right-of-way.

The three leading causes of fatal collisions are__________________.Failing to maintain lane position, speeding, and impaired drivingSpeeding, impaired driving, and the weather conditionsFailing to maintain lane position, speeding, and inexperienced driversImpaired drivers, weather conditions, and weaving in and out of your lane

There is something called “fluid friction.”  Remember that a fluid is something that flows, like air or water.  The fastest trains in the world ride on a cushion of air.  Use what you learned today to write a hypothesis about why those trains can go so much faster than the trains we have here in the Unites States.

The driver of a train moving at a speed v1 sights another train at a distance d ahead of him, moving in the same direction with a slower speed v2. He immediately applies brakes to achieve a constant retardation a. There will be no collision if d is greater than(v1−v2)2a(v21−v22)a(v1−v2)22a(v21−v22)2a

1. A 4,500 kg railway train moves east at a velocity of 5 m/s on a level frictionless track when it collides with a stationary 6,500 kg coach train. If the two trains lock together upon impact, how fast do they move after collision?2. A 945 kg car moves to the right at a velocity of 18 m/s collides with a stationary truck of unknown mass. The two vehicles stick together and move off at a velocity of 7 m/s. What is the mass of the truck

A train is pushing on a stalled vehicle abandoned on a rail road track causing both of them to speed up. Which of the following is true? The force of the train on the vehicle is smaller than the force of the vehicle on the train. The force of the train on the vehicle is equal to the force of the vehicle on the train. The force of the train on the vehicle is larger than the force of the vehicle on the train.Question 3